SpringBoot使用AOP实现统一日志管理：

1、maven pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>spring-boot-example</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.0.0</version>
        </dependency>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

2、AOP定义，包括切面，切入点、通知

package com.example.common;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class LogAop {
    @Before("execution(public * com.example.boot..*Controller..*(..))")
    public void log(JoinPoint joinPoint) {
        String className = joinPoint.getSignature().getDeclaringTypeName();
        String name = joinPoint.getSignature().getName();
        System.out.println("log before ..." + className + "." + name);
    }
}

3、Controller

package com.example.boot;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/user")
@Api("用户API")
public class UserController {

    @RequestMapping(value = "/get/{id}", method = RequestMethod.GET)
    @ApiImplicitParam(name = "id", value = "UserId", paramType = "path",
            required = true, defaultValue = "1", dataTypeClass = Integer.class)
    public String getUser(@PathVariable("id") Integer id) {
        return "hello："+id;
    }
}

4、打开AOP开关

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@MapperScan("com.example.boot")
@SpringBootApplication(scanBasePackages = {"com.example.boot", "com.example.common"})
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class App {

    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}

5、测试

http://localhost:8080/user/get/1

结果打印：

log before ...com.example.boot.UserController.getUser
hello：1

一个创业中的苦逼程序员